aws-eventbridge-lambda module

Reference Documentation:	https://docs.aws.amazon.com/solutions/latest/constructs/

Language	Package
Python	`aws_solutions_constructs.aws_eventbridge_lambda`
Typescript	`@aws-solutions-constructs/aws-eventbridge-lambda`
Java	`software.amazon.awsconstructs.services.eventbridgelambda`

Overview

This AWS Solutions Construct implements an AWS EventBridge rule and an AWS Lambda function.

Here is a minimal deployable pattern definition:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps, Duration } from 'aws-cdk-lib';
import { EventbridgeToLambdaProps, EventbridgeToLambda } from '@aws-solutions-constructs/aws-eventbridge-lambda';
import * as lambda from 'aws-cdk-lib/aws-lambda';
import * as events from 'aws-cdk-lib/aws-events';

const constructProps: EventbridgeToLambdaProps = {
  lambdaFunctionProps: {
    code: lambda.Code.fromAsset(`lambda`),
    runtime: lambda.Runtime.NODEJS_16_X,
    handler: 'index.handler'
  },
  eventRuleProps: {
    schedule: events.Schedule.rate(Duration.minutes(5))
  }
};

new EventbridgeToLambda(this, 'test-eventbridge-lambda', constructProps);

Python

from aws_solutions_constructs.aws_eventbridge_lambda import EventbridgeToLambda, EventbridgeToLambdaProps
from aws_cdk import (
    aws_lambda as _lambda,
    aws_events as events,
    Duration,
    Stack
)
from constructs import Construct

EventbridgeToLambda(self, 'test-eventbridge-lambda',
                    lambda_function_props=_lambda.FunctionProps(
                        code=_lambda.Code.from_asset('lambda'),
                        runtime=_lambda.Runtime.PYTHON_3_9,
                        handler='index.handler'
                    ),
                    event_rule_props=events.RuleProps(
                        schedule=events.Schedule.rate(
                            Duration.minutes(5))
                    ))

Java

import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awscdk.Duration;
import software.amazon.awscdk.services.events.*;
import software.amazon.awscdk.services.lambda.*;
import software.amazon.awscdk.services.lambda.Runtime;
import software.amazon.awsconstructs.services.eventbridgelambda.*;

new EventbridgeToLambda(this, "test-eventbridge-lambda",
        new EventbridgeToLambdaProps.Builder()
                .lambdaFunctionProps(new FunctionProps.Builder()
                        .runtime(Runtime.NODEJS_16_X)
                        .code(Code.fromAsset("lambda"))
                        .handler("index.handler")
                        .build())
                .eventRuleProps(new RuleProps.Builder()
                        .schedule(Schedule.rate(Duration.minutes(5)))
                        .build())
                .build());

Pattern Construct Props

Name	Type	Description
existingLambdaObj?	`lambda.Function`	Existing instance of Lambda Function object, providing both this and `lambdaFunctionProps` will cause an error.
lambdaFunctionProps?	`lambda.FunctionProps`	User provided props to override the default props for the Lambda function.
existingEventBusInterface?	`events.IEventBus`	Optional user-provided custom EventBus for construct to use. Providing both this and `eventBusProps` results an error.
eventBusProps?	`events.EventBusProps`	Optional user-provided properties to override the default properties when creating a custom EventBus. Setting this value to `{}` will create a custom EventBus using all default properties. If neither this nor `existingEventBusInterface` is provided the construct will use the `default` EventBus. Providing both this and `existingEventBusInterface` results an error.
eventRuleProps	`events.RuleProps`	User provided eventRuleProps to override the defaults

Pattern Properties

Name	Type	Description
eventBus?	`events.IEventBus`	Returns the instance of events.IEventBus used by the construct
eventsRule	`events.Rule`	Returns an instance of events.Rule created by the construct
lambdaFunction	`lambda.Function`	Returns an instance of lambda.Function created by the construct

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

Amazon EventBridge Rule

Grant least privilege permissions to EventBridge rule to trigger the Lambda Function

AWS Lambda Function

Configure limited privilege access IAM role for Lambda function
Enable reusing connections with Keep-Alive for NodeJs Lambda function
Enable X-Ray Tracing
Set Environment Variables
AWS_NODEJS_CONNECTION_REUSE_ENABLED (for Node 10.x and higher functions)

Architecture

Architecture Diagram